The North Safety 75SCP100 multi-purpose respirator cartridge is designed for use against Organic Vapor, Chlorine, Hydrogen Chloride, Sulfur Dioxide, Hydrogen Sulfide (Escape), and Hydrogen Fluoride, Chlorine Dioxide, Ammonia, Methylamine and Formaldehyde vapors. This cartridge also includes a built in P100 particulate pre-filter. P100 respirator cartridges are NIOSH certified to have filter efficiency level of 99.7% or greater against oil and non-oil based particulates. The North 75SCP100 cartridges can be used with any North Safety full or half-face mask respirators. Package contains 2 cartridges. North respirator masks sold separately.